Why Do Some North Koreans Defect to the South, Then Go Back? 

“The man’s case is rare — while more than 10,000 North Korean defectors have arrived in South Korea in the past decade, just 30 have returned home, where they face the prospect of being put into forced labor camps, according to official South Korean data.

But defectors and advocates say even if the man’s rationale for leaving South Korea is unclear, the fact that some North Korean defectors are willing to return to one of the world’s most politically isolated countries only highlights how challenging life can be in the South for North Koreans.”

Source: Why North Korean defectors return to one of the world’s most repressive regimes – CNN